Results 41 to 50 of about 39,618 (259)

Formulation of the twisted-light–matter interaction at the phase singularity: The twisted-light gauge [PDF]

Physical Review A, 2015
Twisted light is light carrying orbital angular momentum. The profile of such a beam is a ring-like structure with a node at the beam axis, where a phase singularity exits. Due to the strong spatial inhomogeneity the mathematical description of twisted-light--matter interaction is non-trivial, in particular close to the phase singularity, where the ...
Quinteiro, Guillermo Federico, Kuhn, Tilmann, Reiter, D. E.   +2 more
openaire   +3 more sources

The Beauty of Twist-Bend Nematic Phase: Fast Switching Domains, First Order Fréedericksz Transition and a Hierarchy of Structures

Crystals, 2021
The twist-bend nematic phase (NTB) exhibits a complicated hierarchy of structures responsible for several intriguing properties presented here. These are: the observation of a fast electrooptic response, the exhibition of a large electroclinic effect ...
Vitaly P. Panov, Jang-Kun Song, Georg H. Mehl, Jagdish K. Vij   +3 more
doaj   +1 more source

Identification of Gapless Phases by a Twisting Operator

Physical Review Letters
We propose a general necessary condition for a spin chain with SO(3) spin-rotation symmetry to be gapped. Specifically, we prove that the ground state(s) of an SO(3)-symmetric gapped spin chain must be spin singlet(s), and the expectation value of a twisting operator asymptotically approaches unity in the thermodynamic limit, where finite-size ...
Hang Su, Tengzhou Zhang, Yuan Yao, Akira Furusaki   +3 more
openaire   +3 more sources

Twist-Bend Nematogenic Supramolecular Dimers and Trimers Formed by Hydrogen Bonding

Crystals, 2020
A selection of novel non-symmetric supramolecular liquid crystal dimers and trimers formed by hydrogen-bonding have been prepared and their phase behaviour characterised by polarised optical microscopy, X-ray diffraction and temperature-dependent Fourier-
Rebecca Walker, Damian Pociecha, Alfonso Martinez-Felipe, John MD Storey, Ewa Gorecka, Corrie T Imrie   +5 more
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Statistical Properties of a Twisted Gaussian Schell-Model Beam Carrying the Cross Phase in a Turbulent Atmosphere

Photonics
In this letter, we conducted a detailed investigation of the statistical properties, such as spectral density, spectral degree of coherence (SDOC), orbital angular momentum (OAM) flux density, and propagation factor M2, of a twisted Gaussian Schell-model
Wenshuo Hou, Leixin Liu, Xianlong Liu, Yangjian Cai, Xiaofeng Peng   +4 more
doaj   +1 more source

Quantum interference tuning of spin-orbit coupling in twisted van der Waals trilayers

Physical Review Research, 2022
We show that in van der Waals stacks of twisted hexagonal layers the proximity induced Rashba spin-orbit coupling can be affected by quantum interference.
Csaba G. Péterfalvi, Alessandro David, Péter Rakyta, Guido Burkard, Andor Kormányos   +4 more
doaj   +1 more source

Residual tail twisting in ascidian larvae is stabilized by asymmetric myofibrils that resist bilateral symmetry restoration

FEBS Letters, EarlyView.
Ascidian Ciona larvae initially show strong clockwise tail twisting, which is largely corrected during development. However, a small residual twist remains. This study shows that organized helical myofibrils in tail muscles mechanically stabilize this residual asymmetry, preventing complete restoration of bilateral symmetry and revealing how embryos ...
Yuki S. Kogure, Misaki K. Nishio, Satoru Okuda, Kohji Hotta   +3 more
wiley   +1 more source

Development of the Relationships Among Dynamic Balance Control, Inter-limb Coordination, and Torso Coordination During Gait in Children Aged 3–10 Years

Frontiers in Human Neuroscience, 2021
Knowledge about the developmental process of dynamic balance control comprised of upper arms and upper legs coordination and trunk and pelvis twist coordination is important to advance effective balance assessment for abnormal development.
Hiroki Mani, Saori Miyagishima, Naoki Kozuka, Takahiro Inoue, Naoya Hasegawa, Tadayoshi Asaka   +5 more
doaj   +1 more source

Nanoparticle-induced twist-grain boundary phase

Physical Review E, 2014
By means of high-resolution ac calorimetry and polarizing optical microscopy, it is demonstrated that surface-functionalized spherical CdSSe nanoparticles induce a twist-grain boundary phase when dispersed in a chiral liquid crystal. These nanoparticles can effectively stabilize the one-dimensional lattice of screw dislocations, thus establishing the ...
Trček, M., Cordoyiannis, G., Tzitzios, V., Kralj, S., Nounesis, G., Lelidis, I., Kutnjak, Z.   +6 more
openaire   +3 more sources